$H1color: red;
$titleHeight:50px;
/* flex布局 */
@mixin flex($justify: space-around, $align: center, $wrap: nowrap) {
    display: flex;
    justify-content: $justify;
    align-items: $align;
    flex-wrap: $wrap;
}

// 通用 border
@mixin border($color) {
    border: 1px solid $color;
}

// 手型
@mixin cursor($pointer: pointer) {
    cursor: $pointer;
}